Snubbed truck



Sept. 30, 1958 o. w. NEUMANN SNUBBED TRUCK 2 Sheets-Sheet 1 Filed Jan.20, 1955 NVENTOR. @zi/0V W Q/Zeamyz/ Sept 30, 1958 O. w. NEUMANN2,853,958

SNUBBED TRUCK Filed Jan. 20, 1955 2 Sheets-Sheet-2 United States Patent*SNUBBED TRUCK Otto W. Neumann, Chicago, Ill., assignor to American SteelFoundries, Chicago, Ill., a corporation of New Jersey Application`lanuary 20, 1955, Serial No. 482,955

13 Claims. (Cl. 10S-197) My invention relates to railway car trucks, andmore particularly to a type of truck wherein snubbing means are mountedin each end of the bolster for cooperation with friction plates orpanels on the adjacent side frame columns.

A general object of the invention is the provision of a snubbingarrangement wherein the device is operative to resist the lateral, aswell as the vertical, motion of the bolster, relative to the side framesof a railway car truck.

A more specific object of the invention is the provision of a snubbedtruck in which a pair, of spaced friction shoes are positioned inpockets at the ends of the bolster in angular relationship to each otherand to the longitudinal axis of the bolster.

Another specific object of the invention is the provision of a railwaycar truck in which the side frame columns offer vertical frictionvsurfaces disposed in converging planes.

These and other objects of the invention will become apparent fromanexamination of the following description and drawings, wherein:

Figure l is a fragmentary side elevational view of a railway car truckembodying the invention,

Figure 2 is a partial sectional view taken in the transverse verticalplane indicated by the line 2-2 of Figure 1,

Figure 3 is a fragmentary top plan View, partially in section, of thestructure illustrated in Figure 2 being taken in the horizontal planeindicated by the line 3-3 of Figure 2, and

Figure 4 is a vertical sectional view of the shoe pocket taken along thelongitudinal axis of the bolster indicated by the line 4 4 of Figure 3.

Describing the invention in detail, it will noted that the truckcomprises a side frame indicated generally at6, having compression andtension members 8 and 10, respectively, which are spaced from each othercentrally of the frame and have their ends merged. Vertical columns 12and 14 connect the tension and compression members, intermediate theends of the frame, and are horizontally spaced from each other to definea bolster opening 16 therebetween. The tension member 10 is providedwith upwardly extending flanges 18 which surround spring seat 20 inopening 16.

The inward edges of the vertical columns are V-shaped and .havecorresponding inboard and outboard sides 22 and 24, respectively, whichconverge to form points 26 opposite each other in the opening 16. Sides24 are disposed in inbo-ardly converging Vertical planes, and sides 22are disposed in outboardly converging vertical planes.

The respective planes of each column intersect at the` longitudinal axisof the bolster which is indicated by line A-A and are angularly relatedto the longitudinal axis of the side frame which is indicated by lineB-B. Columns 12 and 14 may be provided with V-shaped wear plates 27welded thereto as .at 28 and which provide friction surfaces 30 parallelto and corresponding with the outer surfaces ofwalls 22 and 24respectively. A

A plurality of coil load support springs indicated diay 2 grammaticallyat 34 may be positioned on the-spring seat 20 of the tension member inthe opening 16 between the columns. Flanges 18 serve to retain the coilspring in position. The springs afford resilient support for a bolsterindicated generally at 36 which extends transversely of the truck. Thebolster comprises spaced top and bottom,

walls 38 and 40, respectively, which are interconnected by spaced sidewalls 42 and 44, respectively. Each end of the bolster is provided witha box section indicated generally at 46, which comprises spaced top andbottom walls 48 and 50. Only one end of the Vbolster and one side frameare shown as both sides of the .truck are symmetrical. The lower surface42 rides on the load springs 34.

The box section 46 may be provided with a pluralityVVV of pockets 54spaced from each other in'angular rela? 4 tionship to each other and tothe longitudinal axis of the I bolster; each of the pockets may benormal to and adfjacent one of the surfaces 30 of the columns.`

The pockets are each defined by inboard and outboardr the walls arepreferably. f offset inwardly at 57 and 59, respectively, to define aknarrow inner portion of the pocket. rlfhe portions 57and l side walls 56and 58, respectively,

59 merge with the rear wall 60 which is formed integrally with the topand bottom walls 48 and 50. Also formed integrally with each of thewalls 4S and '50` is an interrupted oblique wall 62 having spacedsubstantially coplanar wedge surfaces 64 which slope upwardly towardv Ithe surface 30 of adjacent plate 27. l

A friction shoe 66 may be positioned in each pocket.

Each shoe is of generallyA cup-like form having front and? 4 of pocketwall 62. The wedge surfaces 84 may be crowned from the top to bottom topermit a rocking movement of the shoe against the associated surfaces 64to .v

accommodate irregularities in the wear plate. It will be noted that ahandle-like portion 86 of the rear wall of the shoe extends upwardlybetween the spaced wedge surfaces of the pocket. A coil friction spring90 is positioned in the pocket between a bottom wall'50 of the pocketand the spring seat 78 of shoe wal176. k

In operation, the spring 90 urges the spring shoe upwardly causing awedge action between surfaces 64 of the pocket and the surfaces 84 ofthe shoe which forces the shoe friction surface 80 into frictionalengagement with the vertical friction surface 30 of the wear plate to vsnub or dampen the vertical oscillation of the'bolster.

It will also be apparent, that because the vertical friction surfaces ofthe column members are disposed in outwardly converging planes, theengagement between the friction shoes and the respective column membersalso operates to restrict lateral movement outwardly of the bolster.` Asimilar pair of friction shoes engaging column `members on the sideframe on the opposite side of the truck restricts lateral movement ofthe bolster in the opposite direction. Additionally, the engagementbetween," the shoes and the column members restricts any movement of thebolster in a direction longitudinal of the truck.Vv

I claim:

1. In a railway car truck, a side frame comprising tension andcompression members and column members interconnecting said tension andcompression members and defining an opening therebetween, said columnmern- E I bers presenting Vertical friction surfaces obliquely related lto the longitudinal axis of the side vframe, a-p1ur`ality of 'i lPatented Sept.l 3Q, T1958!l of bottom'plate 50 `v The front wall 68pre-` side wallsv 72 and 74 are formed with wing-v, like wedges 82having on the outer sides thereof wedge surfaces p84 which areengageable with wedge surfaces 64` coil load springs seated on saidtension member in said opening, a bolster -member having au endsupported by the load springs, and friction means at the end of saidbolster adjacent said surfaces to dampen the vertical oscillation of'thebolster member, said friction means comprising vertical rear and sidewalls and a horizontal wall at the end of said bolster interconnected toform a pocket therebetween adjacent each of said surfaces, the side andhorizontal Walls of each pocket being perpendicular to the adjacentsurface, spaced wedge walls in said pockets formed integrally with saidside walls and presenting wedge surfaces thereon, a friction shoe ineach of said pockets, said shoe presentinga vertical friction surfaceparallel to said first mentioned friction surface and a wedge surfaceparallel to said tirst mentioned wedge surface, and a coil springpositioned in each of said pockets between the friction shoe and saidhorizontal Wall to urge said shoe into engagement with the firstmentioned friction and wedge surfaces.

2. In a railway car truck, a side frame comprising tension andcompression members, columns interconnecting said members and definingan opening therebetween, the sides of the respective columns beingadjacent said opening and presenting vertical friction surfacesobliquely related to the longitudinal axis of the frame, a plurality ofload supporting springs seated on said tension member in said opening, abolster extending transversely of the truck and having an end receivedin said opening and lsupported by said springs, friction means disposedin the end of said bolster adjacent each of said friction surfaces andeach comprising a bottom wall perpendicular to said adjacent surface, aninner vertical wall parallel to and spaced from said adjacent surface,and vertical side walls perpendicular to said adjacent surface andinterconnecting said bottom and rear walls to form a pockettherebetween, said pocket being open adjacent said adjacent surface, aninclined wall in said pocket presenting wedge surfaces thereon, afriction shoe positioned in said pocket and presenting friction andwedge surfaces thereon parallel to and engageable, respectively, withsaid first mentioned friction and wedge surfaces, and means in saidpocket engaging said shoe to urge its surfaces into engagement with saidfirst mentioned friction and wedge surfaces.

3. In a railway car truck, a side frame comprising a column having avertical friction surface thereon, the plane of said surface being at anangle with respect to the longitudinal axis of the frame, a bolsterresiliently supported by the frame adjacent the column, friction meanscarried by the bolster and engageable with the surface, said frictionmeans comprising horizontally spaced vertical side walls obliquelyrelated to the longitudinal axis of the bolster and perpendicular to thesurface, a horizontal bottom wall perpendicular to the surface, and avertical end wall connecting said side and bottom walls to define acavity therebetween, the open end of said cavity being immediatelyadjacent the surface, a sloping wall in said cavity extending betweensaid side walls and having at least one wedge surface thereon, afriction shoe resiliently positioned in said cavity and having avertical friction surface thereon and at least one wedge surfacethereon, said last mentioned friction and wedge surfaces being parallelto and bearing against the first mentioned friction and wedge surfaces,respectively.

4. In a railway car truck, a side frame comprising a pair yof verticalcolumns defining an opening therebetween, a bolster extendingtransversely of the truck and having an end resiliently supported insaid opening, said bolster end presenting at opposite sides thereofsubstantially V-shaped vertical channels therein, vertical surfacespresented by the columns, said surfaces being disposed in the channelsof said end and lying in vertical planes that converge outboardly of thelongitudinal axis of the side frame at the longitudinal axis of thebolster, said bolster having pockets at each end thereof, wedge means ineachof Asaid pockets, the longitudinal axes of said pockets being normalto the respective vertical friction surfaces and converging inwardly atthe longitudinal axis of the bolster, a friction shoe resilientlypositioned in each of said pockets, each of said shoes comprising aboxlike member having a vertical friction surface engageable with thefirst mentioned friction surfaceand a wedge surface engageable with saidwedge means.

5. In a railway car truck, a side frame having a pair of spaced verticalfriction surfaces lying in planes which converge outboardly of thelongitudinal axis of the side frame, a bolster resiliently supported bysaid frame intermediate said surfaces, said bolster presenting onopposite sides thereof substantially vertical channels in which aredisposed the respective surfaces of the side frame, a pair of frictiondevices on said bolster positioned at an angle with respect to eachother, each of said friction devices being associated with, andpositioned normal to, one of said surfaces, each of said devicescomprising a pocket formed in said bolster and having a wedge surfacetherein, a friction shoe resiliently positioned in said pocket andhaving a wedge surface engaging the wedge surface of the pocket and avertical friction surface engaging said associated friction surface.

6. In a railway car truck, a supporting member, a transverse membersupported thereby, a pair of spaced vertical friction surfaces on one ofsaid members disposed in substantially vertical recesses presented bythe other member, the planes of said surfaces converging at thelongitudinal axis of the transverse member, one of said members having apair of pockets therein, said pockets having longitudinal axes angularlyrelated to the longitudinal axis of the bolster member, each of saidpockets being positioned adjacent one of said surfaces and having wedgemeans therein, a friction shoe resiliently supported in each of saidpockets and comprising a wedge surface engageable with said wedge means,and a friction surface engageable with said adjacent friction surface.

' 7. A railway car truck according to claim 6, wherein the verticalplanes defined by said first mentioned friction surfaces convergeoutboardly of the truck.

8. In a railway car truck, a side frame comprising a column member, amovable member resiliently supported by said frame adjacent said columnmember, and friction means between said members, each of said meanscomprising a vertical friction surface onone of said members anddisposed Within a substantially vertically extending recess presented bythe other member, said surfaces being obliquely related to thelongitudinal axis of the movable member, a horizontal wall and spaceddiagonally substantially coplanar wedge surfaces on the other of saidmembers, a friction shoe engageable with said friction and wedgesurfaces, and spring means positioned between said diagonal surfaces andabutting said shoe and said horizontal wall.

9. In a railway car truck, a side frame comprising compression andtension elements, a pair of spaced column members interconnecting saidelements and defining an opening therebetween, resilient meanspositioned on said tension member in said opening, a bol-ster memberextending transversely of the truck and having an end supported by saidresilient means in said opening adjacent said column members, each ofsaid column members having a pair of sides converging to form a point insaid opening, vertical friction surfaces on corresponding sides of therespective column members, the end of said bolster having pocketstherein located adjacent and normal to said surfaces, wedge surfaces insaid pockets, and resiliently supported friction shoes in `said pocketshaving friction and wedge surfaces engaging said first mentionedfriction and wedge surfaces, respectively, to dampen the verticaloscillation of the bolster member and to resist the longitudinal andtransverse movement of the bolster member with respect to the sideframe.

l0. In a bolster for a railway car truck, a box-like end portion havinga pocket on each side thereof, the longitudinal axes of the pocketsconverging inwardly at the longitudinal axis of the bolster, spacedsubstantially coplanar diagonal friction surfaces in each pocket, and aspring seat in vertical alignment with the space between said surfaces.

11. In a railway car truck, a side member, a movable member resilientlysupported thereby and extending transversely thereof, spaced verticalfriction surfaces on one of said members disposed to extend in openingspresented by the other member, said surfaces being disposed in planesintersecting at the longitudinal axis of the movable member, resilientfriction devices in said other member abutting and engaging saidvertical friction surfaces to snub vertical oscillation of the movablemember relative to the side member and to resist the movement of themovable member relative to the longitudinal and transverse axes of theside member.

12. A railway car truck according to claim 1l, wherein the verticalfriction surfaces are on the side member and the friction devices are inthe movable member.

13. In a railway car truck, a side frame having a pair of spaced columnmembers defining an opening therebetween, a bolster member extendingtransversely of the truck and having an end resiliently supported insaid opening adjacent saidl column members, each of said column membershaving a pair of sides converging to form a point in said opening,vertical friction surfaces on corresponding sides of the respectivecolumn members, said bolster end having pockets disposed adjacent therespective surfaces, wedge surfaces presented in the pockets, andresiliently supported friction shoes disposed in the pockets andfrictionally engageable with the respective pocket wedge surfaces andcolumn friction surfaces.

References Cited in the file of this patent UNITED STATES PATENTS2,352,595 Bachman July 4, 1944 2,394,872 Pierce Feb. 12, 1946 2,434,838Cottrell Jan. 20, 1948 2,495,570 Cottrell Ian. 24, 1950 2,597,909 TackMay 27, 1952 2,669,944 Spenner Feb. 23, 1954

